Wrench



(No Model.) l z'sneew-sheen 1.3

S. W. WARDWBLL, JI.

WRENCH.

Patented Dec. 29V, 1896.

(No Model.) 2 Sheets-Sheet 2.

s. W. WARDWBLL, Jr.

WRENCH. 9

IzgJa.

atta/MW 1H: .wonnls PETERS co. maremma. wAsumcfroN. n. c:4

UNITED STATES PATENT OFFICE.

SIMON VVILLARD VARDWELL, JR., OF BOSTON, MASSACHUSETTS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 573,940, dated December 29, 1896. Application filed May 28, 1896. Serial No. 593,471. (No model.)

To nf/ZZ whom, it may concern:

Beit known that I, SIMON WILLARD WARD- WELL, Jr., a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massach usetts, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

The object of my invention is a wrench so constructed as to reduce the numberof parts, facilitate manufacture, and permit easy manipulation to adjust the distance between the jaws; and to this end I construct a wrench as fully set forth hereinafter and as illustrated in the accompanying drawings, in which- Figure I is a side View of a wrench em bodying my improvements. Fig. 2 is an edge View thereof. Fig. 3 is a face view of the handle member of the Wrench. Fig. 4c is an end view of Fig. 3; Fig. 5, a section on the line 5 5, Fig. 3. Fig. 6 is a face view of the sliding member. Fig. 7 is an edge view of Fig. 6. Fig. S is a View of the worm. Fig. 9 is a section of the worm. Figs. IO to 13 illustrate differ* ent ways of making the sliding member.

The wrench consists, essentially, of three main parts, to wit: what I term the handle member j A, the sliding member B, and the worm C.

The handle member A carries the inner or iixed jaw a, of any suitable construction, and has on opposite sides parallel ribs 'L' fi, and it also has a longitudinal slot x, the inner edges of which are formed into teeth constituting two parallel racksy y. Preferably, as shown in Figs. l to 5, the member A is punched from a single homogeneous piece of metal with a rounded end, the rib i following the edge of this member along the rounded end and at opposite sides. It' desired, however, this member may be otherwise formed, providing, however, it has the channels formed by the guide-ribs t' t' and jaw d.

The member B has a head constituting the outer or movable jaw b, from which extend two parallel iiat stems b' b', each of such a Width as to iit nicely and slidefreely, but without play, in the channel between the guide-ribst at one side of the member A.

In the stems b' b'are formed coincident openings w, adapted to receive the worm C. This worm is put in place after the stems b have been inserted suiiiciently in the channels of j the member A, formed by the ribs t' i, to bring the openings w opposite the slots As thus inserted the worm engages the opposite racks 5 5 As shown in Figs. 6 and 7, the head b and 65 stems b' b of the member Bare formed all of one single continuous piece, which is rst cut into suitable shape, then milled to separate the stems o' Z1', and then slotted, forming the Openings w 1r. While this is a preferable construction, the member B may consist of two sections b2 b2, Fig. IO, formed each with a thickened end piece b3, which end pieces may be brought together and riveted, as indicated in Fig. 13, or, as shown in Fig. ll, this member B may consist of flat pieces 5454, stamped of the shape shown in Fig. 13, with a distance-piece h5, riveted between the head portions, or, as shown in Fig. 12, the member B may consist of a flat piece o4 and a piece b2, having a thickened head portion b3, riveted to the corresponding portion of the part b4.

lVhile the construction illustrated in Figs. l to 7 reduces the number of parts and the extent of manipulation of manufacture and is attended with other advantages, the abovedescribed Wrench, however the parts may be formed, secures a proper distribution of metal to resist the strains, large bearing-surfaces at the portions of the structure subjected to the greatest wear, is extremely simple in its construction, so that it could be manufactured at a small cost, while it presents no protuberances or projecting parts likely to injure the hand and is extremely compact and can be readily manipulated.

In order to prevent any possible spreading of the parallel stem portions b Zi', I prefer to connect them in some suitable mannen-as, for instance, by a screw-bolt or rivet e, passing through an intermediate washer or distance-piece CZ. The intermediate washer or part cl provides shoulders against which the stem portions b bear, thus avoiding any tendeney for the Wrench to bind from the bearing of the stems against the intermediate portion.

Vhile I have shown and prefer a Worm engaging the racks for moving the movable member of the Wrench, any other suitable means for shifting and holding this part may be employed, and, if desired, one of the racks may be dispensed With.

Vhen the studs or trunnions are formed on the Worm, the latter is introduced into place by first spreading the stem portions b if apart and then bringing them together, inclosing the worm. If the latter has a separate pin j', the pin may be vintroduced longitudinally after the Worm is in place.

IVitliout limiting myself to the precise construction of parts shown, I claim as my inventionl. In a Wrench, the combination with a handle member provided at one edge With-a jaw and having longitudinal channels upon opposite sides, of a movable member having two separated plates parallel throughout and adapted to be introduced longitudinally into `and it said side channels, and a jaw connected to the separated plates, and adjusting devices, substantially as described.

2. The combination in a Wrench of the member A having a jaw a, channels on opposite sides,y a slot .r withl edge racks, a member B having a jaw l), two parallel stems littlng the said channels, recesses w, and a Worm C engaging said racks and extending into the said recesses, substantially as set forth.

3. In a Wrench the combination with the handle member formed with a jaw and With a slot having edge teeth, of a movable member formed with a jaw and with parallel separated stems adapted to lit upon opposite sides of the handle member, said stems being provided With recesses, and a Worm in said recesses for engaging the teeth at the edge of the opening in the handle member, substantially as described.

4. A wrench provided With a member A, comprising both the handle and the inner jaw with side channels and with a central slot having edge teeth adapted to engage a Worm or other device for shifting the movable member ofthe Wrench, the latter With parallel stem iitting the channels and recessed to receive the worm, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of tivo subscribing witnesses.

SIMO WILLART) WAllDWl'lL'li, JR.

IVitnesses:

EDWIN I). SMITH, H. A. COOK. 

